16 Vs 17

[punchbuggyracer]

I'm trying to decide on 16's or 17" porsche wheels. I want to do some mountain thrashing and a lot of hard cornering in the streets. In Australia the roads are a little bit rough.

With good firm coil overs are the 17's to hard and going to continualy need balancing?

What size/profile tyres do you guys run?

Thanks......